Split ybc compilation and ruby conversion
Add ability to have additional dependencies for ruby convert

This is useful for clients conversion which is in yast used to avoid
compilation circles.
Merge remote-tracking branch 'origin/master' into split_ybc_and_ruby2

Conflicts:
	data/slepos-system-manager.yml
Merge pull request #214 from yast/split_ybc_and_ruby2

Split ybc and ruby2